The parents of Amadou Diallo plan to hit the city – and four police officers – with a $61 million suit today for gunning down their unarmed son, The Post has learned.

The suit, to be filed in Bronx Supreme Court, seeks $20 million for pain and suffering and $41 million in punitive damages against the cops – “one million for each bullet,” said a source close to the Diallo legal team.

Diallo, a 24-year-old West African immigrant street vendor, died in a fusillade of 41 police bullets as he stood in the vestibule of his Bronx apartment house in February 1999.

The officers said they mistook a black wallet Diallo pulled out of his pocket for a gun.

In papers obtained by The Post, the suit calls the behavior of the officers “shocking to the conscience” and charges that:

* The four officers “intentionally, wantonly, recklessly and maliciously” opened fire on the unarmed Diallo.

* All four, in concert, used excessive and unnecessary force, depriving Diallo of his constitutional rights to be free and secure in his own person.

* The shooting was a result of the NYPD’s practice of racial profiling, a policy sanctioned by police brass.

“Prior to, and on Feb. 4, 1999, although they represent 25 percent of the overall New York City population, African-American citizens … comprised 62 percent of all persons stopped,” the complaint charges.

The family also says in the suit that poor training of Street Crime Unit officers contributed to Diallo’s death, citing Police Commissioner Howard Safir’s dramatic expansion of the unit in 1997.

Safir “tripled the size of the Street Crime Unit from 120 to 380 officers. As a result of this sudden and drastic increase in size, officers assigned to the unit received grossly inadequate training,” the suit charges.

The lead lawyer on the team, Robert Conason – representing Diallo’s mother, Kadiatou Diallo – would not discuss the specifics of the case last night.

“The family’s main concern remains that the U.S. Department of Justice bring federal criminal charges against the officers. The only reason this action is being instituted at this time is because the statute of limitations will soon expire,” Conason said. The civil suit needed to be filed by May 3.